Finding the Fourth Proportional to 1,419.55, 1,958.96 and 790.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,419.55 : 1,958.96 = 790.10 : x
2. Step 2: Convert to fraction form
   1,419.55/1,958.96 = 790.10/x
3. Step 3: Cross multiply
   1,419.55x = 1,958.96 × 790.10
4. Step 4: Simplify right side
   1,419.55x = 1,547,782.62
5. Step 5: Solve for x
   x = 1,547,782.62/1,419.55
6. Step 6: Final answer
   x = 1,090.33